Lease Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lease Commitments [Line Items]
Right-of-use asset	$ 306,109	$ 277,953
Lease liability - current	70,787	56,268
Lease liability - non-current	260,570	251,672
Total operating lease liabilities	331,357	307,940
2021	84,625
2022	68,358
2023	51,661
2024	40,623
2025	31,920
Thereafter	117,745
Total lease payments	394,932
Less: imputed interest	(63,575)
Cash paid for amounts included in the measurement of operating lease liabilities	88,478	98,171
Right-of-use assets obtained in exchange for operating lease obligations	$ 61,027	$ 40,860
Weighted-average remaining lease term in years	7 years	7 years
Weighted-average discount rate	4.60%	5.00%
Operating Lease, Liability, Statement of Financial Position [Extensible List]		us-gaap:OtherLiabilities
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OperatingLeaseLiabilityNoncurrent
Other Liabilities [Member]
Lease Commitments [Line Items]
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities
Other Current Liabilities [Member]
Lease Commitments [Line Items]
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
Other Noncurrent Liabilities [Member]
Lease Commitments [Line Items]
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities